<head>
  <meta charset="utf-8">
  <!-- <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> -->
  <title>Class / 卡司群聊</title>
  <!-- Material Icons -->
  <link href="https://fonts.proxy.ustclug.org/icon?family=Material+Icons" rel="stylesheet">
  <link rel="shortcut icon" href="https://imlooke-class.oss-cn-beijing.aliyuncs.com/favicon.ico">
</head>